videofutureengineers
Circular Motion? :)

Wow! - The best grade 9 video I've ever seen !!! (Newton's 3 Laws with Lego):

3 Laws link

Nice Video explaining Newton's 3 Laws:
video link 3 laws

This guy really understands the outcome of Projectile Motion Calculations!
http://www.youtube.com/watch?v=MLejkyXbJlc&NR=1

Mobius Strip:
http://www.youtube.com/watch?v=4bcm-kPIuHE

Friction (air resistance) on Golf Balls:
golf ball dimples link